s = '101	103	107	109	113	127	131	137	139	149	151	157	163	167	173 179	181	191	193	197	199	211	223	227	229	233	239	241	251	257	263	269	271	277	281 283	293	307	311	313	317	331	337	347	349	353	359	367	373	379	383	389	397	401	409 419	421	431	433	439	443	449	457	461	463	467	479	487	491	499	503	509	521	523	541 547	557	563	569	571	577	587	593	599	601	607	613	617	619	631	641	643	647	653	659 661	673	677	683	691	701	709	719	727	733	739	743	751	757	761	769	773	787	797	809 811	821	823	827	829	839	853	857	859	863	877	881	883	887	907	911	919	929	937	941 947	953	967	971	977	983	991	997'.split()
number_input = input().split()
list = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
if len(number_input) == 3 and number_input[0] in list and number_input[1] in list and number_input[2] in list:
    n = ""
    for i in range(len(number_input)):
        n += str(list.index(number_input[i]))
    n = int(n)
    x1 = 0
    x2 = 0
    m1 = n
    m2 = n
    while not str(m1) in s:
        m1 += 1
        x1 += 1
    while not str(m2) in s:
        m2 -= 1
        x2 += 1
    if x1 == x2:
        print(m2)
    else:
        if x1 < x2:
            print(m1)
        else:
            print(m2)

else:
    print("Wrong input")